Re: Query performance in 9.6.24 vs 14.10

From: Ron Johnson <ronljohnsonjr(at)gmail(dot)com>
To: Bob Jolliffe <bobjolliffe(at)gmail(dot)com>
Cc: PG-General Mailing List <pgsql-general(at)postgresql(dot)org>
Subject: Re: Query performance in 9.6.24 vs 14.10
Date: 2024-01-29 14:18:37
Message-ID: CANzqJaBbOpSvnWzFrhEppKzbFbN44rgsukHpKbKaMGwUrN_r3g@mail.gmail.com
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Yes, jit=on.

I'll test them with jit=off, to see the difference. (The application is
3rd party, so will change it at the system level.)

On Mon, Jan 29, 2024 at 7:09 AM Bob Jolliffe <bobjolliffe(at)gmail(dot)com> wrote:

> Out of curiosity, is the pg14 running with the default jit=on setting?
>
> This is obviously entirely due to the nature of the particular queries
> themselves, but we found that for our workloads that pg versions
> greater than 11 were exacting a huge cost due to the jit compiler. Once we
> explicitly turned jit=off we started to see improvements.
>

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